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Find App Data Folder on Different Windows Versions

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Hello I am writting a C++ Win32 program that records the last file directory opened & writes it to a text file in the computers Application Data folder. But I have been looking in to it & it seems like the directory path for the Application Folder is different for different versions of windows. For example; In Vista the path is something like "C://users/Jack/APPDATA" (I think) but in XP its different I dont remember what. So I guess my question is; how can I make my program find where the Application Data folder is to write & save my text file & how can I make it so that my program will be able to do this over all windows versions?

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You should be able to use the %APPDATA% environment variable as part of your path string. I'm not sure whether all of the File I/O APIs accept that or not but it's worth a shot.

If that doesn't work, you should be able to get the appdata path by using the GetEnvironmentVariable function first, then appending your relative file path to that.

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